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HTML 

              
                <section class="demo1">

  <div class="demo1-scroll"></div>

</section>


<section class="demo2">

  <div class="demo2-loading"></div>

</section>


<section class="demo3">
  <div class="demo3-loading">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
  </div>
</section>


<section class="demo4">

  <div class="demo4-loading">
    <span></span>
    <span></span>
  </div>

</section>


<section class="demo5">

  <div class="demo5-loading">
    <span></span>
  </div>

</section>


<section class="demo6">

  <div class="demo6-loading">
    <span></span>
  </div>

</section>


<section class="demo7">

  <div class="demo7-loading">
    <span></span>
  </div>

</section>

<section class="demo8">

  <div class="demo8-loading">
    <span></span>
  </div>

</section>

<section class="demo9">

  <div class="demo9-loading">
    <span></span>
    <i></i>
  </div>

</section>

<section class="demo10">

  <div class="demo10-loading">
    <span></span>
  </div>

</section>

<section class="demo11">

  <div class="demo11-loading">
    <span></span>
    <span></span>
  </div>

</section>

<section class="demo12">

  <div class="demo12-loading">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
  </div>

</section>

<section class="demo13">

  <div class="demo13-loading">
    <span></span>
    <span></span>
    <span></span>
    <span><i></i></span>
  </div>

</section>

<section class="demo14">

  <div class="demo14-loading">
    <span></span>
  </div>

</section>


<section class="demo15">

  <div class="demo15-loading">
  </div>

</section>

<section class="demo16">

  <div class="demo16-loading">
    <span></span>
  </div>

</section>

<section class="demo17">

  <div class="demo17-loading">
    <span></span>
    <span></span>
    <span></span>
  </div>

</section>

<section class="demo18">

  <div class="demo18-loading">
    <span></span>
  </div>

</section>

<section class="demo19">

  <div class="demo19-loading">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
  </div>

</section>

<section class="demo20">

  <div class="demo20-loading">
    <span></span>
  </div>

</section>
!

CSS 

              
                /* ----------------------------------------- */
/* napisy demo na sekcjach - by było wiadomo które to które */
/* ----------------------------------------- */
body {
    margin: 0;
    display:grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}
section[class^="demo"] {
    position: relative;
    min-height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
}
section[class^="demo"]:before {
    content: attr(class);
    position: absolute;
    top: 1em;
    left: 1em;
    font-size: 0.8em;
    font-weight: normal;
    text-transform: uppercase;
    font-family: sans-serif;
    color: #fff;
}




/* ----------------------------------------- */
/* --------------- DEMO 1------------------- */
/* ----------------------------------------- */
.demo1 {
    background: tomato;
}

.demo1-scroll {
    font-size: 10px;
    height: 4em;
    width: 2em;
    border: 0.2em solid rgba(white, 0.2);
    border-radius: 2em;
}
.demo1-scroll:before { //koleczka
    content: '';
    width: 1.2em;
    height: 1.2em;
    border-radius: 0.7em;
    background: #fff;
    display: block;
    margin: 0.3em auto;
    animation: demo1-scroll-anim 0.5s 0s infinite alternate ease-in-out;
}

@keyframes demo1-scroll-anim {
    50% {
        height: 1.7em;
    }
    100% {
        margin-top: 2.4em;
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 2 ------------------ */
/* ----------------------------------------- */
.demo2 {
    background: mediumpurple;
}

.demo2-loading { //loading zewnetrzny
    font-size: 10px;
    width: 4em;
    height: 4em;
    border-radius: 50%;
    border: 0.2em solid rgba(white, 0.2);
    border-right-color: white;
    animation: demo2-loading-anim 0.5s 0s infinite linear;
    display: flex;
    justify-content: center;
    align-items: center;
}
.demo2-loading:before { //loading wewnetrzny
    content: '';
    width: 3.8em;
    height: 3.8em;
    border-radius: 50%;
    box-sizing: border-box;
    border: 0.2em solid rgba(white, 0.2);
    border-right-color: white;
    display: block;
    animation: demo2-loading-anim 0.3s 0s reverse infinite linear;
}


@keyframes demo2-loading-anim {
    100% {
        transform: rotate(360deg);
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 3 ------------------ */
/* ----------------------------------------- */
.demo3 {
    background: gold;
}

.demo3-loading {
    $dotSize : 1em;
    $gap : 0.2em;

    font-size: 10px;
    display: flex;
    flex-wrap: wrap;
    width: (3 * ($dotSize + ($gap * 2)));

    span {
        margin: $gap;
        width: $dotSize;
        height: $dotSize;
        display: block;
        border-radius: 50%;
        background: #fff;

        @for $i from 1 through 9 {
            &:nth-of-type(#{$i}) {
                $delay : (0.05 * $i) * 1s;
                animation: demo3-loading-anim 1s $delay infinite;
            }
        }
    }
}

@keyframes demo3-loading-anim {
    50% {
        transform: scale(0);
        opacity: 0;
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 4 ------------------ */
/* ----------------------------------------- */
.demo4 {
    background: Darkslategray;
}
.demo4-loading {
    font-size: 10px;
    transform: rotateX(60deg);
    position: relative;
}
.demo4-loading:before { //sloneczko
    width: 1em;
    height: 1em;
    border-radius: 50%;
    background: #fff;
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 0.5em #fff, 0 0 1em #fff, 0 0 1em #fff;
}
.demo4-loading span { //duza os
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%) rotate(0deg);
    width: 7em;
    height: 7em;
    border-radius: 50%;
    border: 0.1em solid rgba(white, 0.2);
    animation: demo4-loading-anim 3.5s 0s infinite linear;
}
.demo4-loading span:before { //duza planeta
    content: '';
    width: 1em;
    height: 1em;
    border-radius: 50%;
    background: #fff;
    position: absolute;
    right: 0;
    top: 50%;
    transform: translate(50%, -50%);
}
.demo4-loading span:nth-of-type(2) { //mala os
    width: 4.3em;
    height: 4.3em;
    animation: demo4-loading-anim 2.5s 0s infinite reverse linear;
}
.demo4-loading span:nth-of-type(2):before { //mala planeta
    width: 0.7em;
    height: 0.7em;
}
@keyframes demo4-loading-anim {
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 5 ------------------ */
/* ----------------------------------------- */
.demo5 {
    background: Blueviolet;
}

.demo5-loading {
    font-size: 12px;
    width: 6em;
    height: 6em;
    position: relative;
}
.demo5-loading span {
    width: 3em;
    height: 3em;
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translate(-50%, 0) scale(1, 1);
    transform-origin: 50% 100%;
    animation: demo5-loading-cnt-anim 1s 0s infinite ease-in;
    display: flex;
    justify-content: center;
    align-items: center;
}
.demo5-loading span:after {
    content: '';
    width: 100%;
    height: 100%;
    border-radius: 0.3em;
    box-shadow: inset 0 0 0 0.4em #fff;
    animation: demo5-loading-anim 1s 0s infinite ease-in;
}
.demo5-loading:after { //shadow
    content: '';
    width: 5em;
    height: 0.3em;
    border-radius: 60%;
    background: radial-gradient(rgba(#fff, 1) 40%, transparent 70%);
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translate(-50%, 50%);
    opacity: 0;
    animation: demo5-loading-anim-shadow 1s 0s infinite ease-in-out;
}
@keyframes demo5-loading-cnt-anim {
    40% {
        transform: translate(-50%, -100%) scale(1,1);
    }
    65% {
        transform: translate(-50%, -130%) scale(1,1);
    }
    80% {
        transform: translate(-50%, 0%) scale(1,0.8);
    }
    90% {
        transform: translate(-50%, 0%) scale(1,0.7);
    }
}
@keyframes demo5-loading-anim {
    40% {
        transform: rotate(-135deg);
    }
    80% {
        transform: rotate(-270deg);
    }
    100% {
        transform: rotate(-270deg);
    }
}
@keyframes demo5-loading-anim-shadow {
    40% {
        opacity: 0;
    }
    75% {
        opacity: 0;
    }
    80% {
        opacity: 0.8;
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 6 ------------------ */
/* ----------------------------------------- */
.demo6 {
    background: Springgreen;
}

.demo6-loading {
    font-size: 12px;
    width: 4rem;
    height: 4rem;
    position: relative;
}
.demo6-loading span {
    width: 3em;
    height: 0.1em;
    background: #fff;
    border-radius: 50%;
    left: 50%;
    top: 50%;
    position: absolute;
    transform: translate(-50%, -50%);
    animation: demo6-loading-anim 1s 0s infinite ease-in-out;
}

@keyframes demo6-loading-anim {
    0% {
        transform: translate(-50%, -50%);
        width: 3em;
        height: 0.1em;
    }
    25% {
        transform: translate(-300%, -50%);
        width: 0.8em;
        height: 0.8em;
        box-shadow: 0 0 1em #fff, 0 0 2em #fff;
    }
    35% {
        transform: translate(-300%, -50%);
        width: 0.8em;
        height: 0.8em;
        box-shadow: 0 0 1em #fff, 0 0 2em #fff;
    }
    50% {
        transform: translate(-50%, -50%);
        width: 3em;
        height: 0.1em;
    }
    75% {
        transform: translate(220%, -50%);
        width: 0.8em;
        height: 0.8em;
        box-shadow: 0 0 1em #fff, 0 0 2em #fff;
    }
    85% {
        transform: translate(220%, -50%);
        width: 0.8em;
        height: 0.8em;
        box-shadow: 0 0 1em #fff, 0 0 2em #fff;
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 7 ------------------ */
/* ----------------------------------------- */
.demo7 {
    background: Darkblue;
}
.demo7-loading {
    font-size: 13px;
    width: 3em;
    height: 3em;
    border: 0.2em solid rgba(#fff, 1);
    border-radius: 50%;
    position: relative;
}
.demo7-loading span:after { //dzwonek
    content: '';
    width: 1em;
    height: 0.4em;
    border-radius: 0.2em 0.2em 0 0;
    top: 0%;
    position: absolute;
    left: 50%;
    top: 0;
    background: #fff;
    transform: translate(-50%, -120%);
}
.demo7-loading:before,
.demo7-loading:after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, calc(-100% + 0.16em)) rotate(0deg);
    height: 1.3em;
    width: 0.32em;
    border-radius: 0.15em;
    background: rgba(#fff, 1);
    transform-origin: 50% calc(100% - 0.16em);
    animation: demo7-loading-anim 2s 0s infinite linear;
    box-shadow: 0 0 0.3em rgba(#fff, 0.5);
}
.demo7-loading:after {
    height: 0.9em;
    border-radius: 1em;
    animation: demo7-loading-anim 5s 0s infinite linear;
}
@keyframes demo7-loading-anim {
    100% {
        transform: translate(-50%, calc(-100% + 0.16em)) rotate(360deg);
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 8 ------------------ */
/* ----------------------------------------- */
.demo8 {
    background: Crimson;
}
.demo8-loading {
    font-size: 10px;
    width: 10em;
    height: 4em;
    overflow: hidden;
    position: relative;
}
.demo8-loading:before {
    content: '';
    position: absolute;
    width: 4em;
    height: 4em;
    border-radius: 50%;
    border: 0.1em solid #fff;
    border-color: #fff #fff transparent transparent;
    left: 50%;
    top: 100%;
    transform: translate(-50%, -50%) rotate(135deg);
    animation: demo8-loading-anim 1s 0s infinite alternate ease-in-out;
}
@keyframes demo8-loading-anim {
    0% {
        transform: translate(-50%, -50%) rotate(-225deg);
    }
    50% {
        border-width: 0.6em;
    }
    100% {
        transform: translate(-50%, -50%) rotate(135deg);
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 10 ----------------- */
/* ----------------------------------------- */
.demo9 {
    background: Deepskyblue;
}
.demo9-loading {
    font-size: 8px;
    width: 10em;
    height: 10em;
    overflow: hidden;
    position: relative;
}
.demo9-loading span { //fale - kontener
    width: 100%;
    height: 3em;
    position: absolute;
    left: 50%;
    bottom: 0;
    transform-origin: 50% 100%;
    transform: translate(-50%, 0) rotate(0deg);
    overflow: hidden;
    z-index: 2;
}
.demo9-loading span:before, //fale
.demo9-loading span:after {
    content: '';
    width: 60em;
    height: 60em;
    border-radius: 29em;
    background: rgba(#fff, 0.9);
    display: block;
    position: absolute;
    left: 50%;
    top: 2.1em;
    transform: translate(-50%, 0) rotate(0deg);
    animation: demo9-loading-wave 5s 0s infinite linear;
}
.demo9-loading span:after {
    transform: translate(-50%, 0.2em) rotate(30deg);
    animation-duration: 5.2s;
    background: rgba(#fff, 1);
}
.demo9-loading i { //lodka
    content: '';
    width: 4em;
    height: 0;
    display: block;
    border: 1em solid transparent;
    border-top-color: #fff;
    border-top-width: 1.5em;
    transform: translate(-50%, 0);
    position: absolute;
    bottom: -0.3em;
    left: 50%;
    animation: demo9-loading-boat 3.2s 0s infinite alternate ease-in-out;
}
.demo9-loading i:before { //zagiel drag
    content: '';
    border-radius: 0.3em;
    width: 0.3em;
    height: 4em;
    background: #fff;
    position: absolute;
    left: 50%;
    bottom: 1.1em;
    transform: translate(-50%, 0);
}
.demo9-loading i:after { //zagiel
    content: '';
    width: 0;
    height: 0;
    border: 1.6em solid transparent;
    border-bottom-color: rgba(#fff, 0.6);
    border-width: 0 3em 4em 3em;
    position: absolute;
    left: 50%;
    bottom: 1.8em;
    transform: translate(-50%, 0) scaleX(-0.8);
    animation: demo9-loading-zagiel 1.2s 0s infinite linear alternate-reverse;
}
@keyframes demo9-loading-boat {
    0% {
        transform: translate(-50%, 10%) rotate(-5deg);
    }
    25% {
        transform: translate(-50%, 0%) rotate(3deg);
    }
    50% {
        transform: translate(-50%, 0%) rotate(-5deg);
    }
    75% {
        transform: translate(-50%, 0%) rotate(3deg);
    }
    100% {
        transform: translate(-50%, 10%) rotate(5deg);
    }
}
@keyframes demo9-loading-wave {
    100% {
        transform: translate(-50%, 0) rotate(360deg);
    }
}
@keyframes demo9-loading-zagiel {
    0% {
        transform: translate(-50%, 0) scaleX(-0.8);
    }
    100% {
        transform: translate(-50%, 0) scaleX(-0.65);
    }
}


/* ----------------------------------------- */
/* --------------- DEMO 10 ----------------- */
/* ----------------------------------------- */
.demo10 {
    background: Brown;
}
.demo10-loading { //border
    font-size: 10px;
    width: 3em;
    height: 3em;
    border-radius: 50%;
    border: 0.3em solid #fff;
    overflow: hidden;
    position: relative;
}
.demo10-loading span { //koleczka
    position: absolute;
    width: 2.6em;
    height: 2.6em;
    border-radius: 50%;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%) rotate(0deg);
    overflow: hidden;
    animation: demo10-loading-anim 1s 0s infinite ease-in-out;
}
.demo10-loading span:after {
    content: '';
    position: absolute;
    width: 1em;
    height: 1em;
    border-radius: 50%;
    top: 0;
    left: 50%;
    transform: translate(-50%, 0);
    overflow: hidden;
    background: rgba(#fff, 1);
    box-shadow: -1px 0 1px rgba(#fff, 0),
                -3px 0 1px rgba(#fff, 0),
                -5px 0 1px rgba(#fff, 0),
                -7px 0 1px rgba(#fff, 0);
    animation: demo10-loading-shadow-anim 1s 0s infinite ease-in-out;
}
@keyframes demo10-loading-anim {
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}
@keyframes demo10-loading-shadow-anim {
    0% {
        box-shadow: -1px 0 1px rgba(#fff, 0),
                    -3px 0 1px rgba(#fff, 0),
                    -5px 0 1px rgba(#fff, 0),
                    -7px 0 1px rgba(#fff, 0);
    }
    25% {
        box-shadow: -1px 0 1px rgba(#fff, 1),
                    -3px 0 1px rgba(#fff, 0.7),
                    -5px 0 1px rgba(#fff, 0.5),
                    -7px 0 1px rgba(#fff, 0);
    }
    50% {
        box-shadow: -1px 0 1px rgba(#fff, 1),
                    -3px 0 1px rgba(#fff, 0.7),
                    -5px 0 1px rgba(#fff, 0.5),
                    -7px 0 1px rgba(#fff, 0.2);
    }
    75% {
        box-shadow: -1px 0 1px rgba(#fff, 1),
                    -3px 0 1px rgba(#fff, 0.7),
                    -5px 0 1px rgba(#fff, 0),
                    -7px 0 1px rgba(#fff, 0);
    }
    100% {
        box-shadow: -1px 0 1px rgba(#fff, 0),
                    -3px 0 1px rgba(#fff, 0),
                    -5px 0 1px rgba(#fff, 0),
                    -7px 0 1px rgba(#fff, 0);
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 11 ----------------- */
/* ----------------------------------------- */
.demo11 {
    background: Coral;
}
.demo11-loading {
    font-size: 10px;
    transform: rotate(0deg);
    box-shadow: inset 0 0 0 0.5em rgba(#fff, 0.2);
    animation: demo11-loading 2s 0s infinite;
    overflow: hidden;
    border-radius: 0.2em;
}
.demo11-loading,
.demo11-loading span {
    width: 3em;
    height: 3em;
    position: relative;
}
.demo11-loading span {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    overflow: hidden;
}
.demo11-loading span:before {
    content: '';
    width: 3em;
    height: 0.5em;
    background: #fff;
    position: absolute;
}
.demo11-loading span:after {
    content: '';
    width: 0.5em;
    height: 3em;
    background: #fff;
    position: absolute;
}
.demo11-loading span:before {
    left: 0;
    top: 0;
    transform: translate(calc(-100% + 0.5em), 0);
    animation: demo11-loading-before-anim 2s 0s infinite;
    transform-origin: 50% 0%;
}
.demo11-loading span:after {
    right: 0;
    bottom: 0;
    transform: translate(0, calc(-100% + 0.5em));
    animation: demo11-loading-after-anim 2s 0s infinite;
    transform-origin: 100% 50%;
}
.demo11-loading span:nth-of-type(2) {
    transform: translate(-50%, -50%) rotate(-180deg);
}

@keyframes demo11-loading-before-anim {
    20% {
        transform: translate(calc(-100% + 0.5em), 0);
    }
    40%, 70% {
        transform: translate(calc(0%), 0) scale(1, 1);
    }
    100% {
        transform: translate(calc(100% - 0.5em), 0);
    }
}
@keyframes demo11-loading-after-anim {
    20% {
        transform: translate(0, calc(-100% + 0.5em));
    }
    40%, 70% {
        transform: translate(calc(0%), 0) scale(1, 1);
    }
    100% {
        transform: translate(0, calc(100% - 0.5em));
    }
}
@keyframes demo11-loading {
    100% {
        transform: rotate(90deg);
    }
}


/* ----------------------------------------- */
/* --------------- DEMO 11 ----------------- */
/* ----------------------------------------- */
.demo12 {
    background: Mediumspringgreen;
}
.demo12-loading {
    font-size: 10px;
    height: 4em;
    width: 4em;
    display: flex;

    span {
        flex-grow: 1;
        margin: 0.1em;
        display: block;
        background: rgba(#fff, 0.9);
        border-radius: 0.3em;
    }

    @for $i from 1 through 6 { //6 spanow
        span:nth-of-type(#{$i}) {
            $delay : (0.2 * $i) * 1s;
            animation: demo12-loading-span-anim 1s $delay infinite alternate ease-in-out;
        }
    }
}

@keyframes demo12-loading-span-anim {
    100% {
        transform: scaleY(0.2);
    }
}


/* ----------------------------------------- */
/* --------------- DEMO 13 ----------------- */
/* ----------------------------------------- */
.demo13 {
    background: tomato;
}

.demo13-loading {
    font-size: 10px;
    width: 4em;
    height: 4em;
    position: relative;
}
.demo13-loading span:nth-of-type(4) { //buzia
    content: '';
    width: 3.8em;
    height: 3.8em;
    background: #fff;
    border-radius: 50%;
    position: relative;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.demo13-loading span:nth-of-type(4):before,
.demo13-loading span:nth-of-type(4):after { //oczy
    content: '';
    width: 0.5em;
    height: 1em;
    background-color: tomato;
    border-radius: 0.5em;
    position: absolute;
    mix-blend-mode: multiply;
    opacity: 0.9;
    left: 1.2em;
    bottom: 2.2em;
    z-index: 2;
    animation: demo13-loading-eye-anim 3s 0s infinite ease-in;
}
.demo13-loading span:nth-of-type(4):after {
    left: auto;
    right: 1.2em;
}
.demo13-loading span:nth-of-type(4) i { //buzia
    width: 3em;
    height: 3em;
    position: absolute;
    left: 50%;
    top: 50%;
    overflow: hidden;
    border-radius: 50%;
    transform: translate(-50%, -48%);
}
.demo13-loading span:nth-of-type(4) i:after { //usta
    content: '';
    width: 3em;
    height: 3em;
    background: tomato;
    position: absolute;
    left: 50%;
    top: 0;
    transform: translate(-50%, 50%);
    opacity: 0.9;
}
.demo13-loading span:nth-of-type(4) i:before { //zeby
    content: '';
    width: 2em;
    height: 0.6em;
    background: #fff;
    position: absolute;
    left: 50%;
    top: calc(50% - 0.2em);
    transform: translate(-50%, 0);
    border-radius: 0 0 50% 50%;
    z-index: 1;
}
.demo13-loading span:nth-of-type(1),
.demo13-loading span:nth-of-type(2),
.demo13-loading span:nth-of-type(3) {
    content: '';
    width: 4em;
    height: 4em;
    position: absolute;
    left: 50%;
    top: 50%;
    mix-blend-mode: overlay;
    opacity: 0.6;
    background: rgba(#fff, 0.7);
}
.demo13-loading span:nth-of-type(1) {
    transform: translate(-50%, -50%) rotate(0deg);
    animation: demo13-loading-anim 3s 0s infinite linear;
}
.demo13-loading span:nth-of-type(2) {
    transform: translate(-50%, -50%) rotate(0deg);
    animation: demo13-loading-anim 3s 0.3s infinite linear;
}
.demo13-loading span:nth-of-type(3) {
    transform: translate(-50%, -50%) rotate(0deg);
    animation: demo13-loading-anim 3s 0.5s infinite linear;
}
@keyframes demo13-loading-anim {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}
@keyframes demo13-loading-eye-anim {
    0% {
        height: 1em;
    }
    3% {
        height: 0;
    }
    6% {
        height: 1em;
    }
}


/* ----------------------------------------- */
/* --------------- DEMO 14 ----------------- */
/* ----------------------------------------- */
.demo14 {
    background: Darkmagenta;
}
.demo14-loading {
    font-size: 10px;
    width: 6em;
    height: 3em;
    position: relative;
}
.demo14-loading span {
    width: 4em;
    height: 4em;
    display: block;
    position: absolute;
    left: 50%;
    top: 0.5em;
    border-radius: 50%;
    transform: translateX(-50%) rotate(0deg);
    animation: demo14-loading 1s 0s infinite ease-in-out alternate;
}
.demo14-loading span:before {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    width: 1.4em;
    height: 1.4em;
    background: #fff;
    border-radius: 50%;
    transform: translate(50%, -50%) scale(1, 0.8);
    transform-origin: 50% 0;
    animation: demo14-loading-span 1s 0s infinite ease-in-out alternate;
}
@keyframes demo14-loading {
    100% {
        transform: translateX(-50%) rotate(-180deg);
    }
}
@keyframes demo14-loading-span {
    50% {
        transform: translate(50%, -50%) scale(0.7, 1.4);
    }
}


/* ----------------------------------------- */
/* --------------- DEMO 14 ----------------- */
/* ----------------------------------------- */
.demo15 {
    background: Darkcyan;
}
.demo15-loading {
    font-size: 10px;
    width: 2em;
    height: 2em;
    position: relative;
    border: 0.5em solid #fff;
    border-radius: 0 0 50% 50%;
    animation: demo15-loading 3s 0s infinite reverse linear;
    transform: rotate(0deg);
}

@keyframes demo15-loading {
    25% {
        border-radius: 0 50% 50% 0.5em;
    }
    50% {
        border-radius: 50% 50% 0 0;
    }
    75% {
        border-radius: 50% 0 0 50%;
    }
   100% {
        border-radius: 0 0 50% 50%;
        transform: rotate(360deg);
   }
}


/* ----------------------------------------- */
/* --------------- DEMO 16 ----------------- */
/* ----------------------------------------- */
.demo16 {
    background: Steelblue;
}
.demo16-loading {
    font-size: 10px;
    width: 3.2em;
    height: 3.2em;
    box-sizing: border-box;
    border: 1em solid #fff;
    position: relative;
    border-radius: 50%;
    animation: demo16-loading 2.6s 0s infinite reverse linear;
    transform: rotate(0deg);
}
.demo16-loading:before,
.demo16-loading:after {
    content: '';
    width: 1em;
    height: 3.8em;
    background: linear-gradient(#fff 0.8em, transparent 0.8em, transparent calc(100% - 0.8em), #fff calc(100% - 0.8em));
    border-radius: 0.2em;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.demo16-loading:after {
    transform: translate(-50%, -50%) rotate(60deg);
}
.demo16-loading span {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 1em;
    height: 1em;
    z-index: 1;
}
.demo16-loading span:before {
    content: '';
    width: 1em;
    height: 3.8em;
    background: linear-gradient(#fff 0.8em, transparent 0.8em, transparent calc(100% - 0.8em), #fff calc(100% - 0.8em));
    border-radius: 0.2em;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%) rotate(120deg);
}
.demo16-loading span:after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: Steelblue;
    z-index: 1;
}
@keyframes demo16-loading {
    100% {
        transform: rotate(360deg);
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 16 ----------------- */
/* ----------------------------------------- */
.demo17 {
    background: Goldenrod;
}
.demo17-loading {
    font-size: 10px;
    width: 3.2em;
    height: 3.2em;
    position: relative;
    box-sizing: border-box;
    border: 0.6em solid #fff;
    border-radius: 50%;
    animation: demo17-loading 3s 0s infinite reverse linear;
    transform: rotate(0deg);
}
.demo17-loading span {
    content: '';
    width: 1em;
    height: 3em;
    border-radius: 0.2em;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.demo17-loading span:nth-of-type(2) {
    transform: translate(-50%, -50%) rotate(60deg);
}
.demo17-loading span:nth-of-type(3) {
    transform: translate(-50%, -50%) rotate(120deg);
}
.demo17-loading span:before,
.demo17-loading span:after {
    box-sizing: border-box;
    content: '';
    position: absolute;
    left: 50%;
    top: -1em;
    width: 100%;
    border: 0.5em solid transparent;
    border-left-width: 0.2em;
    border-right-width: 0.2em;
    transform: translate(-50%, 0);
    border-bottom-color: white;
}
.demo17-loading span:after {
    top: auto;
    bottom: -1em;
    border-top-color: white;
    border-bottom-color: transparent;
}
@keyframes demo17-loading {
    100% {
        transform: rotate(360deg);
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 16 ----------------- */
/* ----------------------------------------- */
.demo18 {
    background: Mediumseagreen;
}
.demo18-loading {
    font-size: 10px;
    width: 5em;
    height: 5em;
    position: relative;
}
.demo18-loading:before {
    content: 'LOADING';
    width: 100%;
    height: 100%;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.8em;
    line-height: 1em;
    font-weight: bold;
    color: Mediumseagreen;
    font-family: sans-serif;
    box-shadow: 0 0 1px rgba(#fff, 0.6);
    top: 50%;
    background: #fff;
    transform: translate(-50%, -50%);
    animation: demo18-loading-anim 1s 0s infinite ease-in-out alternate;
    opacity: 0.5;
}
@keyframes demo18-loading-anim {
    0% {
        transform: translate(-50%, -50%) scale(1, 1);
        opacity: 1;
    }
    50% {
        transform: translate(-50%, -50%) scale(0, 1);
        opacity: 1;
    }
    50.001% {
        transform: translate(-50%, -50%) scale(0, 1);
        opacity: 0.5;
    }
    99.999% {
        transform: translate(-50%, -50%) scale(-1, 1);
        opacity: 0.5;
    }
    100% {
        transform: translate(-50%, -50%) scale(1, 1);
        opacity: 1;
    }
}



/* ----------------------------------------- */
/* --------------- DEMO 19 ----------------- */
/* ----------------------------------------- */
.demo19 {
    background: Cornflowerblue;
}
.demo19-loading {
    font-size: 10px;
    width: 3em;
    height: 3em;
    border-radius: 50%;
    position: relative;
}
.demo19-loading span {
    width: 1em;
    height: 3.2em;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.demo19-loading span:before,
.demo19-loading span:after {
    content: '';
    width: 0.6em;
    height: 0.6em;
    background: #fff;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    top: 0;
    transform: translate(-50%, -50%);

}
.demo19-loading span:after {
    top: auto;
    bottom: 0;
    transform: translate(-50%, 50%);
}

.demo19-loading {
    @for $i from 0 through 4 {
        span:nth-of-type(#{$i+1}) {
            transform: translate(-50%, -50%) rotate(#{(360 / 10 * $i) * 1deg});
            $delay : (0.1 * $i) * 1s;
            animation: demo19-loading-anim 1s $delay infinite alternate;
        }
    }
}

@keyframes demo19-loading-anim {
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}


/* ----------------------------------------- */
/* --------------- DEMO 20 ----------------- */
/* ----------------------------------------- */
.demo20 {
    background: #bada55;
}
.demo20-loading {
    font-size: 10px;
    width: 4em;
    height: 3em;
    border-radius: 50%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.demo20-loading:before,
.demo20-loading:after,
.demo20-loading span {
    content: '';
    width: 0.8em;
    height: 0.8em;
    margin: 0.2em;
    border-radius: 50%;
    background: #fff;
    display: block;
}
.demo20-loading:before {
    order: 1;
    animation: demo20-loading-anim 1s 0s infinite ease-in-out alternate;
}
.demo20-loading:after {
    order: 2;
    animation: demo20-loading-anim 1s 0.3s infinite ease-in-out alternate;
}
.demo20-loading span {
    order: 3;
    animation: demo20-loading-anim 1s 0.6s infinite ease-in-out alternate;
}
@keyframes demo20-loading-anim {
    100% {
        opacity: 0;
        transform: scale(0.5);
    }
}
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